WARNING
System Restart After Fault Acknowledgment/Restart
Can Cause Death, Serious Injury, or Damage to Property.
After fault acknowledgment/restart, the system immediately resumes operation with the
values specied by the control, and outputs are activated if the power-on condition is fullled.
Take appropriate measures (e.g. start button with monitored starting) to prevent unintentional
restarting and to ensure a dened start of the system.
Reference
You will nd further information on the LED display during startup in Chapter "Startup / self-test
of the MSS 3RK3 Advanced (Page 85)"
7.3.2.3 Displays on the 3RK3 ASIsafe basic central unit
LED Display Description
DEVICE O No voltage, undervoltage, overvoltage
green Device OK, user program in safety mode
green ashing
0.5 Hz (ratio 1:1)
System power-up
ickering green Device OK, user program in test mode
yellow User program stopped (conguring mode; user program not released; no
user program)
yellow ashing
0.5 Hz (ratio 1:1)
Factory settings restored
ickering yellow See Chapter "Restoring factory settings (Page 347)"
red System stop (e.g. wiring error)
The system stop can only be exited by means of a restart after switching
the power supply o and on. If the fault is still present after the system
has restarted, you must replace the 3RK3 central unit.
red ashing
0.5 Hz (ratio 1:1)
Error in conguration
(e.g. memory module removed during operation)
ickering red See Chapter "Restoring factory settings (Page 347)"
AS-i O AS-i bus OK, code table complete
red AS-i bus OK, but code sequence error
red ashing
0.5 Hz (ratio 1:1)
AS-i bus not OK, no or incomplete code table;
SET ≠ TARGET AS-i expansion
TEACH O Code sequences complete
Flashing yellow Teaching of code sequences in progress
yellow Teaching of code sequences successfully completed, code sequence ta‐
bles can now be applied
Diagnostics / service
7.3 Diagnostics with LEDs
SIRIUS 3RK3 Modular Safety System
260 Equipment Manual, 07/2020, NEB926253002000/RS-AC/006
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